🧬 EVOLUTIONARY EQUATIONS
Darwin recorded 348 finches on one island and 127 on another. How many finches did he record altogether?
475 finches
Alex completes ⅖ of a 20‑page mission briefing. How many pages is that?
8 pages
Stanley digs a hole 1.8 m deep. Zero digs one 0.7 m deeper. How deep is Zero’s hole?
2.5 m
A ration book gives 12 sweets per week. If an evacuee shares them equally with a friend, how many do they each get?
6
A Maya stone block weighs 45 kg. Another weighs 27 kg. What is their total weight?
72 kg
A scientist observes that a population of beetles increases by 150 each month. If there were 620 beetles in January, how many will there be in March?
920 beetles
Alex uses ¾ of his gadget battery during a mission. If the battery holds 120 minutes of charge, how many minutes does he use?
90 minutes
A bottle of water at Camp Green Lake contains 0.75 L. If Stanley drinks 0.3 L, how much is left?
0.45 L
Bread is shared in the ratio 3:1 between adults and children. If there are 32 slices, how many go to children?
8
A small pyramid model has a base length of 6 cm. The real pyramid is 10 times larger. What is the real base length?
60 cm
A researcher tags 240 butterflies. ⅜ of them migrate north. How many butterflies migrate north?
90 butterflies
Alex divides a coded message into 5 equal sections. He decrypts ⅗ of the message. If the whole message is 250 words, how many words has he decrypted?
150 words
Stanley digs 4 holes, each 1.25 m deep. What is the total depth dug?
5 m
A family receives 2.4 L of milk. They use ⅝ of it in cooking. How much milk is left?
0.9 L
A Maya farmer harvests 84 maize cobs. He stores ⅔ of them and trades the rest. How many does he trade?
28
A species of bird lays eggs in two seasons. In spring, 45% of the 320 eggs hatch. In summer, ⅔ of the 180 eggs hatch. How many hatch in total?
264 eggs hatch
Alex has two gadgets:
Gadget A uses ⅖ of its power in one mission.
Gadget B uses 30% of its power. If both gadgets start with 300 units of power, which gadget uses more and by how much?
Gadget A uses 30 more units.
A lizard moves 0.85 m every second. How far does it travel in 12 seconds?
10.2 m
Two evacuee groups receive food in ratios:
Group A: 5:3
Group B: 7:5 If both groups receive 64 items, which group gives more to the smaller share, and by how much?
Group B gives 2 more items to its smaller share. Difference ≈ 2.67 → rounded to 2 items
A rectangular temple floor measures 12 m × 7.5 m. Workers tile ⅗ of it on Monday. How many square metres do they tile?
54 m²
A scientist studies two evolving populations.
Population A increases by 25% from 480.
Population B decreases by 15% from 560. After these changes, how many more creatures are in Population A than B?
124 creatures
Alex mixes two chemical solutions:
Solution X: ⅓ of 450 ml
Solution Y: ⅚ of 300 ml He then uses ¼ of the total mixture. How much mixture remains?
300 ml remain
Stanley fills a bucket with 3.6 L of muddy water. He filters out 35% of it as waste. He then spills 0.18 L. How much clean water remains?
2.16 L
A ration pack contains:
40% vegetables
⅜ grains
The rest is protein
If the pack weighs 4.8 kg, how much protein is there?
1.08 kg of protein
A stepped pyramid has 3 levels.
Level 1 area = 144 m²
Level 2 area is 25% smaller
Level 3 area is ⅓ of Level 2
What is the total area of all three levels?
288 m²